Permanganate-Pyruvic Acid Initiated Polymerization of Methacrylamide |
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Authors: | U D N Bajpai |
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Institution: | Department of Post-Graduate Studies and Research in Chemistry , University of Jabalpur , Jabalpur, 482001, India |
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Abstract: | A combined system of potassium permanganate and pyruvic acid was found to initiate radical polymerization of vinyl monomers, especially acrylamides. From kinetic investigations of the polymerization of methacrylamide, it was found that this initiator induced a radical polymerization which proceeded with an overall activation energy of 15.7 kcal/mol. The rate is given by Rp=Kmethacrylamide] 1 pyruvic acid]° KMnO4]1 in aqueous and water-DMF mediums. In the presence of DMF the initial rate was found to decrease but the kinetic equation remained the same. The investigations were done at 35 ± 0.2°C in nitrogen. Besides the clinical importance of pyruvic acid found in blood, urine, muscles, etc., it is a good initiator in conjunction with KMnO4 for vinyl polymerization. It is therefore interesting to study the polymerization of methacrylamide using the KMnO4-pyruvic acid redox couple in aqueous systems in order to find whether this system follows the same kinetic features of vinyl polymerization by a radical mechanism. |
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